340563f479
1.update touch sensor driver for esp32s2; 2.update unit test for touch sensor; 3.update register files about touch sensor;
197 lines
7.5 KiB
C
197 lines
7.5 KiB
C
// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <string.h>
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#include "esp_err.h"
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#include "driver/uart.h"
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#include "esp32s2/rom/uart.h"
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#define ROM_UART_DRIVER_ENABLE 0
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#if ROM_UART_DRIVER_ENABLE
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static uint8_t scope_uart_num = 0;
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static int8_t uart_used = 0;
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#else
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static uint8_t scope_uart_num = 255;
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static int8_t uart_used = -1;
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#endif
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static int scope_tx_io_num = 0;
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static int scope_rx_io_num = 0;
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static int scope_debug_baud_rate = 256000;
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static unsigned char datascope_output_buffer[42] = {0}; // Data buff.
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/**
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* @brief Translate a float data to four unsigned char data for uart TX.
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* @param target target float data address.
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* @param buf save translated data.
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* @param offset the start position in buf.
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* @return
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* - void
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*/
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static void float_to_byte(float *target, unsigned char *buf, unsigned char offset)
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{
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memcpy(buf + offset, (uint8_t*)target, 4);
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}
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/**
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* @brief Add data to channel buff.
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* @param Data target data.
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* @param Channel target channel (1 - 10).
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* @return
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* - void
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*/
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static void datascope_get_channel_data(float data, unsigned char channel)
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{
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if ( (channel > 10) || (channel == 0) ) {
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return;
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} else {
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switch (channel) {
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case 1: float_to_byte(&data,datascope_output_buffer, channel*4-3); break;
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case 2: float_to_byte(&data,datascope_output_buffer, channel*4-3); break;
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case 3: float_to_byte(&data,datascope_output_buffer, channel*4-3); break;
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case 4: float_to_byte(&data,datascope_output_buffer, channel*4-3); break;
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case 5: float_to_byte(&data,datascope_output_buffer, channel*4-3); break;
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case 6: float_to_byte(&data,datascope_output_buffer, channel*4-3); break;
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case 7: float_to_byte(&data,datascope_output_buffer, channel*4-3); break;
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case 8: float_to_byte(&data,datascope_output_buffer, channel*4-3); break;
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case 9: float_to_byte(&data,datascope_output_buffer, channel*4-3); break;
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case 10: float_to_byte(&data,datascope_output_buffer, channel*4-3); break;
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}
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}
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}
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/**
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* @brief Transform float data to DataScopeV1.0 data format.
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* @param channel_num the number of channel that wait to be translated.
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* @return
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* - The number of the UART TX data.
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*/
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static unsigned char datascope_data_generate(unsigned char channel_num)
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{
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if ( (channel_num > 10) || (channel_num == 0) ) {
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return 0;
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} else {
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datascope_output_buffer[0] = '$'; //frame header
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switch(channel_num) {
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case 1: datascope_output_buffer[channel_num*4+1] = channel_num*4+1; return channel_num*4+2; break;
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case 2: datascope_output_buffer[channel_num*4+1] = channel_num*4+1; return channel_num*4+2; break;
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case 3: datascope_output_buffer[channel_num*4+1] = channel_num*4+1; return channel_num*4+2; break;
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case 4: datascope_output_buffer[channel_num*4+1] = channel_num*4+1; return channel_num*4+2; break;
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case 5: datascope_output_buffer[channel_num*4+1] = channel_num*4+1; return channel_num*4+2; break;
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case 6: datascope_output_buffer[channel_num*4+1] = channel_num*4+1; return channel_num*4+2; break;
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case 7: datascope_output_buffer[channel_num*4+1] = channel_num*4+1; return channel_num*4+2; break;
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case 8: datascope_output_buffer[channel_num*4+1] = channel_num*4+1; return channel_num*4+2; break;
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case 9: datascope_output_buffer[channel_num*4+1] = channel_num*4+1; return channel_num*4+2; break;
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case 10: datascope_output_buffer[channel_num*4+1] = channel_num*4+1; return channel_num*4+2; break;
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}
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}
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return 0;
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}
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/**
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* @brief Send touch sensor data to HMI in PC via UART.
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* @param uart_num Choose uart port (0, 1).
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* @param data The addr of the touch sensor data.
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* @param channel_num The number of channel that wait to be translated.
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* @return
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* - ESP_FAIL Error
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* - The number of the UART TX data.
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*/
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int test_tp_print_to_scope(float *data, unsigned char channel_num)
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{
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uint8_t uart_num = scope_uart_num;
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if (uart_num >= UART_NUM_MAX) {
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return ESP_FAIL;
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}
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if ( (channel_num > 10) || (channel_num == 0) || (NULL == data) ) {
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return ESP_FAIL;
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}
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for(uint8_t i = 0 ; i < channel_num; i++) {
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datascope_get_channel_data(data[i] , i+1); // write data x into channel 1~10.
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}
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unsigned char out_len = datascope_data_generate(channel_num); // Generate n number data.
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unsigned char *out_data = datascope_output_buffer;
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// Init uart.
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if(uart_num != uart_used) {
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return 0;
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} else {
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#if ROM_UART_DRIVER_ENABLE
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uart_tx_wait_idle(uart_num); // Default print uart mumber is 0.
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for(int i=0; i<out_len; i++) {
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uart_tx_one_char(out_data[i]);
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}
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return out_len;
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#else
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uart_wait_tx_done(uart_num, portMAX_DELAY);
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return uart_write_bytes(uart_num, (const char *)out_data, out_len);
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#endif
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}
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}
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/**
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* @brief Enable scope debug function. Print the touch sensor raw data to "DataScope" tool via UART.
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* "DataScope" tool is touch sensor tune tool. User can monitor the data of each touch channel,
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* evaluate the touch system's touch performance (sensitivity, SNR, stability, channel coupling)
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* and determine the threshold for each channel.
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*
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* @attention 1. Choose a UART port that will only be used for scope debug.
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* @attention 2. Use this feature only during the testing phase.
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* @attention 3. "DataScope" tool can be downloaded from Espressif's official website.
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*
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* @param uart_num The uart port to send touch sensor raw data.
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* @param tx_io_num set UART TXD IO.
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* @param rx_io_num set UART RXD IO.
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* @param baud_rate set debug port baud rate.
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*
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* @return
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* - ESP_OK: succeed
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* - ESP_FAIL: the param uart_num is error
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*/
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esp_err_t test_tp_scope_debug_init(uint8_t uart_num, int tx_io_num, int rx_io_num, int baud_rate)
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{
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#if ROM_UART_DRIVER_ENABLE
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uart_tx_wait_idle(0); // Default print uart mumber is 0.
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if(uart_num != 0) {
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uart_tx_switch(uart_num);
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// uart_div_modify(uart_num, baud_rate); //DivLatchValue : (clock << 4)/baudrate.
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}
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#else
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if(uart_used == uart_num) {
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return ESP_FAIL;
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}
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if (uart_num >= UART_NUM_MAX) {
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return ESP_FAIL;
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}
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scope_uart_num = uart_num;
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scope_tx_io_num = tx_io_num;
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scope_rx_io_num = rx_io_num;
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scope_debug_baud_rate = baud_rate;
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uart_config_t uart_config = {
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.baud_rate = scope_debug_baud_rate,
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.data_bits = UART_DATA_8_BITS,
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.parity = UART_PARITY_DISABLE,
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.stop_bits = UART_STOP_BITS_1,
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.flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
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};
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uart_param_config(uart_num, &uart_config);
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// Set UART pins using UART0 default pins i.e. no changes
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uart_set_pin(uart_num, scope_tx_io_num, scope_rx_io_num,
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UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
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uart_driver_install(uart_num, 1024, 2048, 0, NULL, 0);
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uart_used = uart_num;
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#endif
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return ESP_OK;
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}
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